import logging
from logging.handlers import TimedRotatingFileHandler
from logging.config import dictConfig
import os

from flask import Flask
import datetime


def create_app(test_config=None):
    # create and configure the app
    app = Flask(__name__, instance_relative_config=True)
    
    dictConfig({
        'version': 1,
        'formatters': {'default': {
            'format': '[%(asctime)s] %(levelname)s in %(module)s: %(message)s',
        }},
        'handlers': {'wsgi': {
            'class': 'logging.StreamHandler',
            'stream': 'ext://flask.logging.wsgi_errors_stream',
            'formatter': 'default'
        }},
        'root': {
            'level': 'INFO',
            'handlers': ['wsgi']
        }
    })
    formatter = logging.Formatter(
 
        "[%(asctime)s][%(filename)s:%(lineno)d][%(levelname)s][%(thread)d] - %(message)s")
 
    handler = TimedRotatingFileHandler(
 
        "flask.log", when="D", interval=1, backupCount=15,
 
        encoding="UTF-8", delay=False, utc=True)
 
    handler.setLevel(logging.INFO)
    handler.setFormatter(formatter)
    app.logger.addHandler(handler)
 
    app.config.from_mapping(
        SECRET_KEY='dev',
        DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'),
    )

    if test_config is None:
        # load the instance config, if it exists, when not testing
        app.config.from_pyfile('config.py', silent=True)
    else:
        # load the test config if passed in
        app.config.from_mapping(test_config)

    # ensure the instance folder exists
    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass
    
    from . import user
    app.register_blueprint(user.bp)

    from . import nucleic
    app.register_blueprint(nucleic.bp)    

    from . import account
    app.register_blueprint(account.bp)    

    from . import vaccine
    app.register_blueprint(vaccine.bp)    

    from . import medical_point
    app.register_blueprint(medical_point.bp)    

    from . import db
    db.init_app(app)
    
    app.permanent_session_lifetime = datetime.timedelta(seconds=10*60)
    return app